Lexical strata and phonotactic perplexity minimization Eric Rosen author 2021-02 text Proceedings of the Society for Computation in Linguistics 2021 Allyson Ettinger editor Ellie Pavlick editor Brandon Prickett editor Association for Computational Linguistics Online conference publication rosen-2021-lexical https://aclanthology.org/2021.scil-1.48/ 2021-02 415 419